The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2015
Filed:
Nov. 14, 2008
Christian Reichinger, Neutraubling, DE;
Walter Schrod, Regensburg, DE;
Hans-jörg Wiehoff, Regensburg, DE;
Christian Reichinger, Neutraubling, DE;
Walter Schrod, Regensburg, DE;
Hans-Jörg Wiehoff, Regensburg, DE;
CONTINENTAL AUTOMOTIVE GMBH, Hannover, DE;
Abstract
In a method for calibration, a piezo-actuator () is actuated in a motor vehicle by a control circuit and an output stage. The piezo actuator is, in particular, part of the injection valve. The piezo-actuator () is subjected to an electric calibration pulse that is in the high-level signal range thereof when the control circuit and the output stage are in operation, the frequency thereof being modified over time. The associated electric impendence curve over the frequency is determined and evaluated during the calibration pulse. The output stage is controlled by the control circuit in such a manner that the calibration pulse is generated.